1 /*

     2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package jdk.jfr.event.oldobject;

    27 

    28 import java.lang.reflect.Array;

    29 import java.util.ArrayList;

    30 import java.util.List;

    31 

    32 import jdk.jfr.Recording;

    33 import jdk.jfr.consumer.RecordedClass;

    34 import jdk.jfr.consumer.RecordedEvent;

    35 import jdk.jfr.consumer.RecordedObject;

    36 import jdk.jfr.internal.test.WhiteBox;

    37 import jdk.test.lib.Asserts;

    38 import jdk.test.lib.jfr.EventNames;

    39 import jdk.test.lib.jfr.Events;

    40 

    41 /*

    42  * @test

    43  * @key jfr

    44  * @requires vm.gc == "null"

    45  * @library /test/lib /test/jdk

    46  * @modules jdk.jfr/jdk.jfr.internal.test

    47  * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestClassLoaderLeak

    48  */

    49 public class TestClassLoaderLeak {

    50 

    51     public static List<Object> classObjects = new ArrayList<>(OldObjects.MIN_SIZE);

    52 

    53     public static void main(String[] args) throws Exception {

    54         WhiteBox.setWriteAllObjectSamples(true);

    55 

    56         try (Recording r = new Recording()) {

    57             r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");

    58             r.start();

    59             TestClassLoader testClassLoader = new TestClassLoader();

    60             for (Class<?> clazz : testClassLoader.loadClasses(OldObjects.MIN_SIZE / 20)) {

    61                 // Allocate array to trigger sampling code path for interpreter / c1

    62                 for (int i = 0; i < 20; i++) {

    63                     Object classArray = Array.newInstance(clazz, 20);

    64                     Array.set(classArray, i, clazz.newInstance());

    65                     classObjects.add(classArray);

    66                 }

    67             }

    68             r.stop();

    69             List<RecordedEvent> events = Events.fromRecording(r);

    70             Events.hasEvents(events);

    71             for (RecordedEvent e : events) {

    72                 RecordedObject object = e.getValue("object");

    73                 RecordedClass rc = object.getValue("type");

    74                 if (rc.getName().contains("TestClass")) {

    75                     return;

    76                 }

    77             }

    78             Asserts.fail("Could not find class leak");

    79         }

    80     }

    81 }